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  • Stages of Breast Cancer

     

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    Prognostic Factors
    Fact Sheet

    The stages of breast cancer range from 0 to IV (0 to 4). Stage depends on the combination of:

    For example, a cancer with a T1 tumor (less than 2 cm), no lymph nodes with cancer (N0) and no metastases (M0) is classified as stage I (T1N0M0).

    Most often, the higher the stage of the cancer, the poorer the prognosis (chances for survival) will be. The highest stage (stage IV) is any cancer with metastases (M1), no matter the size of the tumor or the lymph node status.

    The table below lists the tumor (T), lymph node (N) and metastases (M) classifications.

    Stages of Breast Cancer 

    Ductal carcinoma in situ  

    Stage 0

    TisN0M0

    Early breast cancer 

    Stage Ia

    T1N0M0

    Stage Ib

    T0N1miM0

    T1N1miM0

    Stage IIa

    T0N1M0

    T1N1M0

    T2N0M0

    Stage IIb

    T2N1M0

    T3N0M0

    Locally advanced breast cancer 

    Stage IIIa

    T0N2M0

    T1N2M0

    T2N2M0

    T3N1M0

    T3N2M0

    Stage IIIb

    T4N0M0

    T4N1M0

    T4N2M0

    Stage IIIc

    Any T, N3M0

    Metastatic breast cancer 

    Stage IV

    Any T, any N, M1

    Updated 02/05/14

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